Assigm



(Remodel.)

C. D. C OWAN.` GOMPOUND BOILER FOR GENERATING STEAM.' No. 282,276. Patented July 81. `1883.

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UNITED STATES PATENT ,OEEICE.

CHARLES D. COWAN, OF ABROCKTO-N,` MASSACHUSETTS, ASSIGNOR OF ONE HALF TO'BUFUS G. SHEPARD, OF SAME PLACE.

ooMPouND BolLl-:R FOR GENERATING STEAM.

SPECIFICATION forrriing` part of Letters Patent No. 282,276, dated July 31, 1883,

" Application iled May 25,1883. (No model.)

To all whom it may concern:

Be it known that I, CHARLES D. CowAN, a citizen of the UnitedStates, residing at Brock-A ton, in the county of Plymouth ,andy State o1" Massachusetts, have invented a new 'and useful Improvement in Compound VBoilers for Generating Steam, of which the following is a specification.

My invention relates to that class of boilers with which auxiliary heaters are used, the object being to economize in fuel, and to so arrange the parts that there will be no noise from the steam that may be generated in the auxiliary heater. I attain these objects by the mechanism illustrated in the accompanying drawings, in which* i Figure 1 is a view'of my invention in elevation and section. Fig.` 2 is a horizontal section taken on line x y of Fig. l.

A represents a tubular boiler set in brick, as shown. B is a bank of tubes into which the water-supply of the boiler enters at E, and after circulating through this bank of tubes passes through the pipe H to the boiler A The pipe H terminatesl in `a vertical pipe, -H H2, the lower end of which, H', enters the boiler below thewater-line, while the upper end, H2,

enters thesteam-pipe at L. I have made this i arrangement so that incase any steam may be formed in the auxiliarylheater B it may pass directly to the steam-pipe L M, and not go Y through the boiler A. This arrangement prevents all noise in the boiler A. The water of condensation passes through the pipes PPP2 back to the auxiliary heater B. Theaction of i `any ever made.

I claim as my invention- In a stea1n-generating device, the combina- `tionof the boiler A, the pipes H', H2, and H, with the auxiliary heater B, and lire-passages D and K, all arranged substantially as described, and forthe purpose set forth.

'CHARLES D. COVVAN. Witnesses:

FRANK G. PARKER, OHAs. SPAULDING. 

